Intel D945PWM User manual

Intel®Desktop Board
D945PWM
Specification Update
Release Date: November 2006
Order Number: D50872-004US
The Intel®Desktop Board D945PWM may contain design defects or errors known as errata, which
may cause the product to deviate from published specifications. Current characterized errata are
documented in this Specification Update.

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The Intel®desktop board D945PWM may contain design defects or errors known as errata which may cause
the product to deviate from published specifications. Current characterized errata are available on request.
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CONTENTS
REVISION HISTORY..................................................................................................................................... v
PREFACE.........................................................................................................................................................vi
Specification Update for the Intel®Desktop Board D945PWM
GENERAL INFORMATION ............................................................................................................................3
SPECIFICATION CHANGES.........................................................................................................................5
ERRATA ..........................................................................................................................................................6

Intel®Desktop Board D945PWM Specification Update
v
REVISION HISTORY
Date of Revision Version Description
February 13, 2006 -001 This document is the first Specification Update for the
Intel®Desktop Board D945PWM.
July 2006 -002 Added Specification Changes 1, Erratum 1 and updated
General Information table.
October 2006 -003 Added Erratum 2.
November 2006 -004 Added specification Changes 2.

Intel®Desktop Board D945PWM Specification Update
v
i
PREFACE
This document is an update to the specifications contained in the Intel ®Desktop Board
D945PWM Technical Product Specification (Order number D44275). It is intended for hardware
system manufacturers and software developers of applications, operating systems, or tools. It
will contain Specification Changes, Errata, Specification Clarifications, and Documentation
Changes.
For specification updates concerning the Intel processor that may apply to this desktop board,
refer to the following:
•Intel ®Pentium®D Processor 900∆Sequence and Intel®Pentium®Processor Extreme
Edition 955Δ, 965ΔSpecification Update (Order Number 310307)
•Intel ®Pentium®D Processor 800∆Sequence and Intel®Pentium®Processor Extreme
Edition 840∆Specification Update (Order Number 306832)
•Intel ®Celeron®D Processors 300ΔSequence Specification Update (Order Number 302354)
•Intel ®Pentium®4 Processor Specification Update (Order Number 249199)
Unless otherwise noted in this document, it should be assumed that any processor errata for a
given stepping are applicable to the Altered Assembly (AA) revision(s) associated with that
stepping.
Refer to the Intel ®945G/945GZ/945P/945PL Express Chipset Family Specification Update
(Order Number 307503) for specification updates concerning the 82945G GMCH Controller and
that may apply to the desktop board D945PWM. Unless otherwise noted in this document, it
should be assumed that any MCH errata for a given stepping are applicable to the Altered
Assembly (AA) revision(s) associated with that stepping.
Refer to the Intel ®I/O Controller Hub 7 (ICH7) Family EDS Specification Update (Order Number
307014) for specification updates concerning the 82801GB ICH7 and 82801GR ICH7R I/O
Controller Hub and that may apply to the desktop board D945PWM. Unless otherwise noted in
this document, it should be assumed that any ICH 7 errata for a given stepping are applicable to
the Altered Assembly (AA) revision(s) associated with that stepping.
Nomenclature
Specification Changes are modifications to the current published specifications. These
changes will be incorporated in the next release of the specifications.
Errata are design defects or errors. Characterized errata may cause the desktop board
D945PWM’s behavior to deviate from published specifications. Hardware and software designed
to be used with any given Altered Assembly (AA) and BIOS revision level must assume that all
errata documented for that AA and BIOS revision level are present on all desktop boards.
Specification Clarifications describe a specification in greater detail or further highlight a
specification’s impact to a complex design situation. These clarifications will be incorporated in
the next release of the specifications.
Documentation Changes include typos, errors, or omissions from the current published
specifications. These changes will be incorporated in the next release of the specifications.

Specification Update for the
Intel®Desktop Board D945PWM

Intel®Desktop Board D945PWM Specification Update
3
GENERAL INFORMATION
Basic Desktop Board D945PWM Identification Information
AA Revision BIOS Revision Notes
D42248-100 SN94510J.86A.0057 1-2
D42248-101 SN94510J.86A.0057 1-2
D42248-102 SN94510J.86A.0057 1-2
NOTES:
1. The AA number is found on a small label on the component side of the board.
2. The 82945P Chipset kit used on this AA revision consists of two components as follows:
Device Stepping S-Spec Numbers
82945P MCH A1 SL8HT
82801GB ICH7 A1 SL8FX

Intel®Desktop Board D945PWM Specification Update
4
Summary Table of Changes
The following table indicates the Specification Changes, Errata, Specification Clarifications, or
Documentation Changes that apply to the Intel®Desktop Board D945PWM. Intel intends to fix
some of the errata in a future revision of the desktop board, and to account for the other
outstanding issues through documentation or specification changes as noted. This table uses
the following notations:
CODES USED IN SUMMARY TABLE
Doc: Document change or update that will be implemented.
PlanFix: This erratum may be fixed in a future revision of the desktop board,
driver, or BIOS.
Fixed: This erratum has been previously fixed.
NoFix: There are no plans to fix this erratum.
Shaded: This erratum is either new or modified from the previous version of the
document.
NO. PLANS SPECIFICATION CHANGES
1 Doc Change to Section 2.8.2.3, Add-in Card Connectors
2 Doc Changes to Section 1.9.2 Audio Connectors
NO. PLANS ERRATA
1 Plan Fix The placement of capacitors behind PCI Express* x1 connector slot 1 may
prohibit some PCI Express x1 add-in cards from properly connecting to the
motherboard
2 Fixed Design for the rear-panel MIC bias circuitry will not correctly amplify rear-
panel microphone recording.

Intel®Desktop Board D945PWM Specification Update
5
SPECIFICATION CHANGES
The Specification Changes listed in this section apply to the Desktop Board D945PWM Technical
Product Specification (Order Number D44275). All Specification Changes will be incorporated
into a future version of that specification.
1. The following note will be added to the Technical
Product Specification in Section 2.8.2.3 Add-in Card
Connectors:
 NOTE
Capacitors required for the audio circuitry are located within the ATX keep-out area near PCI
Express* x1 slot 1, and may limit the use of some PCI Express x1 cards.
2. The following note will be added to the Technical
Product Specification in Section 1.9.2 Audio Connectors:
 INTEGRATOR’S NOTES
Electrostatic discharge (ESD) can damage desktop board
components. Front-panel connectors should provide sufficient
protection to prevent ESD damage to components inside the chassis
enclosure.

Intel®Desktop Board D945PWM Specification Update
6
ERRATA
1. The placement of capacitors behind PCI Express* x1
connector slot 1 may prohibit some PCI Express x1 add-
in cards from properly connecting to the motherboard
PROBLEM:Due to the design and placement of the audio circuitry on this motherboard, it was necessary to
position capacitors in the keep-out zone behind PCI Express* x1 connector slot 1.
IMPLICATION:Some PCI Express x1 add-in cards may not fully connect to PCI Express x1 connector slot 1,
due to interference between capacitors in the keep-out zone and I/O connectors on the add-in card that are
located on the I/O bracket, in line with the edge fingers on the card.
WORKAROUND:None
STATUS:MAY BE FIXED IN A LATER HARDWARE REVISION.
2. Design for the rear-panel MIC bias circuitry will not
correctly amplify rear-panel microphone recording
PROBLEM:Due to the transistor design for the rear-panel microphone circuitry, there is no audible recording
level.
IMPLICATION:The rear-panel microphone will not record at correct volume levels
WORKAROUND:The front panel audio connector may be used as it is not affected by this issue and will
produce an amplified microphone recording.
STATUS: Fixed.